Biosorption of Co(II) ions from aqueous solution using Chrysanthemum indicum: Kinetics,equilibrium and thermodynamics |
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| Institution: | 1. Faculty of Technical Sciences, University of Novi Sad, Trg Dositeja Obradovica 6, Novi Sad, Serbia;2. Institute of Nuclear Sciences Vinca, University of Belgrade, Belgrade, Postanski fah 522, Serbia;1. School of Mechanical Engineering, Kyungpook National University, 80 Daehak-ro, Buk-gu, Daegu, 702-701, Republic of Korea;2. Korea Atomic Energy Research Institute, 1045 Daeduk-daero, Dukjin-dong, Yuseong-gu, Daejeon, 305-353, Republic of Korea;1. Power & Industrial Systems R&D Center, Power Systems Company, Toshiba Corporation, 4-1, Ukishima-cho, Kawasaki-ku, Kawasaki 210-0862, Japan;2. Isogo Nuclear Engineering Center, Power Systems Company, Toshiba Corporation, 8, Shinsugita-cho, Isogo-ku, Yokohama 235-8523, Japan;1. School of Nuclear Science and Technology, Xi''an Jiaotong University, No. 28 Xianning West Road, Xi''an, Shaanxi 710049, PR China;2. Shanghai Nuclear Engineering Research & Design Institute, 29 Hongchao Road, Shanghai 200233, PR China;3. Department of Nuclear Engineering and Radiological Sciences, University of Michigan, 2200 Bonisteel, Ann Arbor, MI 48109, USA;1. Clean Energy Research Laboratory, University of Ontario Institute of Technology, Oshawa, ON L1H 7K4, Canada;2. Lassonde School of Engineering, York University, 4700 Keele St, Toronto, ON M3J 1P3, Canada;3. Faculty of Engineering and Applied Science, Memorial University of Newfoundland, St. John''s, Newfoundland A1B 3X5, Canada |
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| Abstract: | The present study investigates the adsorption potential of Chrysanthemum indicum flower in its raw (CIF-R) and biochar (CIF-BC) form for the removal of cobalt ions from aqueous solution. The adsorbents were characterized for their surface area using BET analysis, surface morphology and elemental composition with SEM-EDAX and for the presence of functional groups by FTIR analysis. Batch adsorption experiments were carried out to evaluate the effect of process parameters, viz. pH, adsorbent dosage, initial metal ion concentration, contact time, stirring speed, presence of interfering ions and temperature on the adsorption of Co(II) ion using both the adsorbents. The optimum conditions for maximum removal of Co(II) ion was ascertained to be pH 5 for both adsorbents, adsorbent dose of 4 g/L and 3 g/L, equilibrium time of 60 min and 45 min, respectively, for CIF-R and CIF-BC. The maximum adsorption capacity of CIF-R and CIF-BC was found to be 14.84 mg/g and 45.44 mg/g, respectively, for the removal of Co(II) ion. The mechanism of adsorption was studied using different models of adsorption kinetics, isotherms and thermodynamics. It was inferred that Co(II) adsorption on both CIF-R and CIF-BC followed pseudo-second order kinetics and Langmuir isotherm model with the process being spontaneous and endothermic in nature. |
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| Keywords: | Biosorption Cobalt ions Biochar Kinetics Isotherms Thermodynamics |
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